* propagate the largest sum_moe_sq to the whole group
* if there were no nonzero estimates, as in group 5, this is innocuous -- no changes are made
* if there were any nonzero estimates, the sum of squared MOEs was modified once
* by the largest MOE^2 of the nonzero estimates, and that's the MOE to use
bysort group (sum_moe_sq) : replace sum_moe_sq = sum_moe_sq[_N]
list, sepby(group)